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Segment information - Summary of Reconciliation Between Reportable Segment Gross Profit and Loss to Consolidated Loss Before Tax (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of operating segments [abstract]      
Segment gross profit € 2,591 € 2,015 € 1,722
Research and development (912) (837) (615)
Sales and marketing (1,135) (1,029) (826)
General and administrative (450) (442) (354)
Finance income 246 94 275
Finance costs (91) (510) (333)
Income/(loss) before tax € 249 € (709) € (131)